@Override
  protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    this.requestWindowFeature(Window.FEATURE_NO_TITLE);
    //
    //	this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.main_login);

    mEtAccount = (EditText) findViewById(R.id.mainLoginEditAccount);
    mEtPassword = (EditText) findViewById(R.id.mainLoginEditPassword);
    mBtnLogin = (Button) findViewById(R.id.mainLoginBtn);
    mBtnRegister = (Button) findViewById(R.id.main_btn_register);

    /* this is to render the password edittext font to be default */
    mEtPassword.setTypeface(Typeface.DEFAULT);
    mEtPassword.setTransformationMethod(new PasswordTransformationMethod());

    mBtnLogin.setOnClickListener(
        new OnClickListener() {
          public void onClick(View v) {
            MainActivity.this.tryLogin();
          }
        });

    mBtnRegister.setOnClickListener(
        new OnClickListener() {
          public void onClick(View v) {
            Intent intent0 = new Intent(MainActivity.this, RegisterActivity.class);
            startActivity(intent0);
          }
        });
  }
  private void showUserHashDialog() {
    String userHash = NavigineApp.Settings.getString("user_hash", "");

    LayoutInflater inflater = getLayoutInflater();
    View view = inflater.inflate(R.layout.user_hash_dialog, null);
    _userEdit = (EditText) view.findViewById(R.id.user_hash_edit);
    _userEdit.setText(userHash);
    _userEdit.setTypeface(Typeface.MONOSPACE);
    // _userEdit.addTextChangedListener(new TextWatcher()
    //  {
    //    public void afterTextChanged(Editable s) { }
    //    public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
    //    public void onTextChanged(CharSequence s, int start, int before, int count)
    //    {
    //      String text = _userEdit.getText().toString();
    //      int length  = _userEdit.getText().length();
    //
    //      if (text.endsWith("-"))
    //        return;
    //
    //      if (count <= before)
    //        return;
    //
    //      if (length == 4 || length == 9 || length == 14)
    //      {
    //        _userEdit.setText((text + "-"));
    //        _userEdit.setSelection(length + 1);
    //      }
    //    }
    //  });

    AlertDialog.Builder alertBuilder = new AlertDialog.Builder(mContext);
    alertBuilder.setView(view);
    alertBuilder.setTitle("Enter user ID");
    alertBuilder.setNegativeButton(
        getString(R.string.cancel_button),
        new DialogInterface.OnClickListener() {
          @Override
          public void onClick(DialogInterface dlg, int id) {}
        });

    alertBuilder.setPositiveButton(
        getString(R.string.ok_button),
        new DialogInterface.OnClickListener() {
          @Override
          public void onClick(DialogInterface dlg, int id) {
            String userHash = _userEdit.getText().toString();
            SharedPreferences.Editor editor = NavigineApp.Settings.edit();
            editor.putString("user_hash", userHash);
            editor.commit();
            NavigineApp.applySettings();
            refreshMapList();
          }
        });

    AlertDialog dialog = alertBuilder.create();
    dialog.setCanceledOnTouchOutside(false);
    dialog.show();
  }